--- /dev/null
+/*
+ * This file is part of the sigrok-firmware-fx2lafw project.
+ *
+ * Copyright (C) 2009 Ubixum, Inc.
+ * Copyright (C) 2015 Jochen Hoenicke
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, see <http://www.gnu.org/licenses/>.
+ */
+
+#define OE_CTL (((1 << CTL_BIT) << 4) | (1 << CTL_BIT)) /* OEx = CTLx = 1 */
+
+static BOOL set_voltage(BYTE channel, BYTE val);
+
+struct samplerate_info {
+ BYTE rate;
+ BYTE wait0;
+ BYTE wait1;
+ BYTE opc0;
+ BYTE opc1;
+ BYTE out0;
+ BYTE ifcfg;
+};
+
+/* Change to support as many interfaces as you need. */
+static BYTE altiface = 0;
+
+static volatile WORD ledcounter = 0;
+
+static volatile __bit dosud = FALSE;
+static volatile __bit dosuspend = FALSE;
+
+extern __code BYTE highspd_dscr;
+extern __code BYTE fullspd_dscr;
+
+void resume_isr(void) __interrupt RESUME_ISR
+{
+ CLEAR_RESUME();
+}
+
+void sudav_isr(void) __interrupt SUDAV_ISR
+{
+ dosud = TRUE;
+ CLEAR_SUDAV();
+}
+
+void usbreset_isr(void) __interrupt USBRESET_ISR
+{
+ handle_hispeed(FALSE);
+ CLEAR_USBRESET();
+}
+
+void hispeed_isr(void) __interrupt HISPEED_ISR
+{
+ handle_hispeed(TRUE);
+ CLEAR_HISPEED();
+}
+
+void suspend_isr(void) __interrupt SUSPEND_ISR
+{
+ dosuspend = TRUE;
+ CLEAR_SUSPEND();
+}
+
+void timer2_isr(void) __interrupt TF2_ISR
+{
+ TOGGLE_CALIBRATION_PIN();
+
+ if (ledcounter && (--ledcounter == 0))
+ LED_CLEAR();
+
+ TF2 = 0;
+}
+
+/**
+ * Each LSB in the nibble of the byte controls the coupling per channel.
+ *
+ * Setting PE3 disables AC coupling capacitor on CH0.
+ * Setting PE0 disables AC coupling capacitor on CH1.
+ */
+static void set_coupling(BYTE coupling_cfg)
+{
+ if (coupling_cfg & 0x01)
+ IOE |= 0x08;
+ else
+ IOE &= ~0x08;
+
+ if (coupling_cfg & 0x10)
+ IOE |= 0x01;
+ else
+ IOE &= ~0x01;
+}
+
+static BOOL set_numchannels(BYTE numchannels)
+{
+ if (numchannels == 1 || numchannels == 2) {
+ BYTE fifocfg = 7 + numchannels;
+ EP2FIFOCFG = fifocfg;
+ EP6FIFOCFG = fifocfg;
+ return TRUE;
+ }
+
+ return FALSE;
+}
+
+static void clear_fifo(void)
+{
+ GPIFABORT = 0xff;
+ SYNCDELAY3;
+ FIFORESET = 0x80;
+ SYNCDELAY3;
+ FIFORESET = 0x82;
+ SYNCDELAY3;
+ FIFORESET = 0x86;
+ SYNCDELAY3;
+ FIFORESET = 0;
+}
+
+static void stop_sampling(void)
+{
+ GPIFABORT = 0xff;
+ SYNCDELAY3;
+ INPKTEND = (altiface == 0) ? 6 : 2;
+}
+
+static void start_sampling(void)
+{
+ int i;
+
+ SET_ANALOG_MODE();
+
+ clear_fifo();
+
+ for (i = 0; i < 1000; i++);
+
+ while (!(GPIFTRIG & 0x80))
+ ;
+
+ SYNCDELAY3;
+ GPIFTCB1 = 0x28;
+ SYNCDELAY3;
+ GPIFTCB0 = 0;
+ GPIFTRIG = (altiface == 0) ? 6 : 4;
+
+ /* Set green LED, don't clear LED afterwards (ledcounter = 0). */
+ LED_GREEN();
+ ledcounter = 0;
+}
+
+static void select_interface(BYTE alt)
+{
+ const BYTE *pPacketSize = \
+ ((USBCS & bmHSM) ? &highspd_dscr : &fullspd_dscr)
+ + (9 + (16 * alt) + 9 + 4);
+
+ altiface = alt;
+
+ if (alt == 0) {
+ /* Bulk on EP6. */
+ EP2CFG = 0x00;
+ EP6CFG = 0xe0;
+ EP6GPIFFLGSEL = 1;
+ EP6AUTOINLENL = pPacketSize[0];
+ EP6AUTOINLENH = pPacketSize[1];
+ } else {
+ /* Iso on EP2. */
+ EP2CFG = 0xd8;
+ EP6CFG = 0x00;
+ EP2GPIFFLGSEL = 1;
+ EP2AUTOINLENL = pPacketSize[0];
+ EP2AUTOINLENH = pPacketSize[1] & 0x7;
+ EP2ISOINPKTS = (pPacketSize[1] >> 3) + 1;
+ }
+}
+
+static BOOL set_samplerate(BYTE rate)
+{
+ BYTE i = 0;
+
+ while (samplerates[i].rate != rate) {
+ i++;
+ if (i == sizeof(samplerates) / sizeof(samplerates[0]))
+ return FALSE;
+ }
+
+ IFCONFIG = samplerates[i].ifcfg;
+
+ AUTOPTRSETUP = 7;
+ AUTOPTRH2 = 0xE4; /* 0xE400: GPIF waveform descriptor 0. */
+ AUTOPTRL2 = 0x00;
+
+ /*
+ * The program for low-speed, e.g. 1 MHz, is:
+ * wait 24, CTLx=0, FIFO
+ * wait 23, CTLx=1
+ * jump 0, CTLx=1
+ *
+ * The program for 24 MHz is:
+ * wait 1, CTLx=0, FIFO
+ * jump 0, CTLx=1
+ *
+ * The program for 30/48 MHz is:
+ * jump 0, CTLx=Z, FIFO, LOOP
+ *
+ * (CTLx is device-dependent, could be e.g. CTL0 or CTL2.)
+ */
+
+ /* LENGTH / BRANCH 0-7 */
+ EXTAUTODAT2 = samplerates[i].wait0;
+ EXTAUTODAT2 = samplerates[i].wait1;
+ EXTAUTODAT2 = 1;
+ EXTAUTODAT2 = 0;
+ EXTAUTODAT2 = 0;
+ EXTAUTODAT2 = 0;
+ EXTAUTODAT2 = 0;
+ EXTAUTODAT2 = 0;
+
+ /* OPCODE 0-7 */
+ EXTAUTODAT2 = samplerates[i].opc0;
+ EXTAUTODAT2 = samplerates[i].opc1;
+ EXTAUTODAT2 = 1; /* DATA=0 DP=1 */
+ EXTAUTODAT2 = 0;
+ EXTAUTODAT2 = 0;
+ EXTAUTODAT2 = 0;
+ EXTAUTODAT2 = 0;
+ EXTAUTODAT2 = 0;
+
+ /* OUTPUT 0-7 */
+ EXTAUTODAT2 = samplerates[i].out0;
+ EXTAUTODAT2 = OE_CTL;
+ EXTAUTODAT2 = OE_CTL;
+ EXTAUTODAT2 = 0;
+ EXTAUTODAT2 = 0;
+ EXTAUTODAT2 = 0;
+ EXTAUTODAT2 = 0;
+ EXTAUTODAT2 = 0;
+
+ /* LOGIC FUNCTION 0-7 */
+ EXTAUTODAT2 = 0;
+ EXTAUTODAT2 = 0;
+ EXTAUTODAT2 = 0;
+ EXTAUTODAT2 = 0;
+ EXTAUTODAT2 = 0;
+ EXTAUTODAT2 = 0;
+ EXTAUTODAT2 = 0;
+ EXTAUTODAT2 = 0;
+
+ for (i = 0; i < 96; i++)
+ EXTAUTODAT2 = 0;
+
+ return TRUE;
+}
+
+static BOOL set_calibration_pulse(BYTE fs)
+{
+ switch (fs) {
+ case 0: // 100Hz
+ RCAP2L = -10000 & 0xff;
+ RCAP2H = (-10000 & 0xff00) >> 8;
+ return TRUE;
+ case 1: // 1kHz
+ RCAP2L = -1000 & 0xff;
+ RCAP2H = (-1000 & 0xff00) >> 8;
+ return TRUE;
+ case 10: // 1kHz
+ RCAP2L = (BYTE)(-100 & 0xff);
+ RCAP2H = 0xff;
+ return TRUE;
+ case 50: // 50kHz
+ RCAP2L = (BYTE)(-20 & 0xff);
+ RCAP2H = 0xff;
+ return TRUE;
+ default:
+ return FALSE;
+ }
+}
+
+/* Set *alt_ifc to the current alt interface for ifc. */
+BOOL handle_get_interface(BYTE ifc, BYTE *alt_ifc)
+{
+ (void)ifc;
+
+ *alt_ifc = altiface;
+
+ return TRUE;
+}
+
+/*
+ * Return TRUE if you set the interface requested.
+ *
+ * Note: This function should reconfigure and reset the endpoints
+ * according to the interface descriptors you provided.
+ */
+BOOL handle_set_interface(BYTE ifc,BYTE alt_ifc)
+{
+ if (ifc == 0)
+ select_interface(alt_ifc);
+
+ return TRUE;
+}
+
+BYTE handle_get_configuration(void)
+{
+ /* We only support configuration 0. */
+ return 0;
+}
+
+BOOL handle_set_configuration(BYTE cfg)
+{
+ /* We only support configuration 0. */
+ (void)cfg;
+
+ return TRUE;
+}
+
+BOOL handle_vendorcommand(BYTE cmd)
+{
+ stop_sampling();
+
+ /* Set red LED, clear after timeout. */
+ LED_RED();
+ ledcounter = 1000;
+
+ /* Clear EP0BCH/L for each valid command. */
+ if (cmd >= 0xe0 && cmd <= 0xe6) {
+ EP0BCH = 0;
+ EP0BCL = 0;
+ while (EP0CS & bmEPBUSY);
+ }
+
+ switch (cmd) {
+ case 0xe0:
+ case 0xe1:
+ set_voltage(cmd - 0xe0, EP0BUF[0]);
+ return TRUE;
+ case 0xe2:
+ set_samplerate(EP0BUF[0]);
+ return TRUE;
+ case 0xe3:
+ if (EP0BUF[0] == 1)
+ start_sampling();
+ return TRUE;
+ case 0xe4:
+ set_numchannels(EP0BUF[0]);
+ return TRUE;
+ case 0xe5:
+ SET_COUPLING(EP0BUF[0]);
+ return TRUE;
+ case 0xe6:
+ SET_CALIBRATION_PULSE(EP0BUF[0]);
+ return TRUE;
+ }
+
+ return FALSE; /* Not handled by handlers. */
+}
+
+static void init(void)
+{
+ EP4CFG = 0;
+ EP8CFG = 0;
+
+ SET_ANALOG_MODE();
+
+ /* In idle mode tristate all outputs. */
+ GPIFIDLECTL = 0x00; /* Don't enable CTL0-5 outputs. */
+ GPIFCTLCFG = 0x80; /* TRICTL=1. CTL0-2: CMOS outputs, tri-statable. */
+ GPIFWFSELECT = 0x00;
+ GPIFREADYSTAT = 0x00;
+
+ stop_sampling();
+
+ set_voltage(0, 1);
+ set_voltage(1, 1);
+ set_samplerate(1);
+ set_numchannels(2);
+ select_interface(0);
+}
+
+static void main(void)
+{
+ /* Save energy. */
+ SETCPUFREQ(CLK_12M);
+
+ init();
+
+ /* Set up interrupts. */
+ USE_USB_INTS();
+
+ ENABLE_SUDAV();
+ ENABLE_USBRESET();
+ ENABLE_HISPEED();
+ ENABLE_SUSPEND();
+ ENABLE_RESUME();
+
+ /* Global (8051) interrupt enable. */
+ EA = 1;
+
+ /* Init timer2. */
+ RCAP2L = -TIMER2_VAL & 0xff;
+ RCAP2H = (-TIMER2_VAL & 0xff00) >> 8;
+ T2CON = 0;
+ ET2 = 1;
+ TR2 = 1;
+
+ RENUMERATE_UNCOND();
+
+ PORTECFG = 0;
+ PORTCCFG = 0;
+ PORTACFG = 0;
+ OEE = 0xff;
+ OEC = 0xff;
+ OEA = 0xff;
+
+ while (TRUE) {
+ if (dosud) {
+ dosud = FALSE;
+ handle_setupdata();
+ }
+
+ if (dosuspend) {
+ dosuspend = FALSE;
+ do {
+ /* Make sure ext wakeups are cleared. */
+ WAKEUPCS |= bmWU | bmWU2;
+ SUSPEND = 1;
+ PCON |= 1;
+ __asm
+ nop
+ nop
+ nop
+ nop
+ nop
+ nop
+ nop
+ __endasm;
+ } while (!remote_wakeup_allowed && REMOTE_WAKEUP());
+
+ /* Resume (TRM 6.4). */
+ if (REMOTE_WAKEUP()) {
+ delay(5);
+ USBCS |= bmSIGRESUME;
+ delay(15);
+ USBCS &= ~bmSIGRESUME;
+ }
+ }
+ }
+}
projects / sigrok-firmware-fx2lafw.git / commitdiff